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ASP构造大数据量的分页SQL语句

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1<%@Language = "VBScript" Codepage = "936"%>
2<%
3\'分页sql语句生成代码
4Function GetPageSql(TblName,FldName,PageSize,PageIndex,OrderType,StrWhere)
5 Dim StrTemp,StrSql,StrOrder
6 \'根据排序方式生成相关代码
7 If OrderType = 0 Then
8 StrTemp = "> (Select Max([" & FldName & "])"
9 StrOrder = " Order By [" & FldName & "] Asc"
10 Else
11 StrTemp = "< (Select Min([" & FldName & "])"
12 StrOrder = " Order By [" & FldName & "] Desc"
13 End If
14
15 \'若是第1页则无须复杂的语句
16 If PageIndex = 1 Then
17 StrTemp = ""
18 If StrWhere <> "" Then
19 Strtmp = " Where " & StrWhere
20 End If
21 StrSql = "Select Top " & PageSize & " * From [" & TblName & "]"
& Strtmp & StrOrder
22 Else \'若不是第1页,构造sql语句
23 StrSql = "Select Top " & PageSize & " * From [" & TblName & "]
Where [" & FldName & "]" & StrTemp & _
24 " From (Select Top " & (PageIndex-1) * PageSize & " [" & FldName & "] From [" & TblName & "]"
25 If StrWhere <> "" Then
26 StrSql = StrSql & " Where " & StrWhere
27 End If
28 StrSql = StrSql & StrOrder & ") As Tbltemp)"
29 If StrWhere <> "" Then
30 StrSql = StrSql & " And " & StrWhere
31 End If
32 StrSql = StrSql & StrOrder
33 End If
34 GetPageSql = StrSql \'返回sql语句
35End Function
36Response.Write(GetPageSql("Message","MessageID",10,1,0,""))
37%>
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